Combined electrical and key operated lock



June 23, 1936. F. HoNsEl.

COMBINED ELECTRICAL AND lKEY OPERATED LOCK Filed Sept. 2l, 1934 Patented June 23, 1936 APATENT' OFFICE CovrlNED ELECTRICAL AND KEY oPERATED LOCK i Fritz Honsel, Milan, Italy,

Application Septemiier' 21, 1934, serial No. 744,966

' in Italy september 26, 1933 2 Claims. (C1. 7o-5o) This invention relates to anr improved lock,'and has for its object to provide simple and emcient means whereby the lock can vbe operated electri-` cally and/or mechanically.

f The invention will bel described with reference to the accompanying drawing, in which:-,v

Fig. 1 shows the mechanism of the door lock with the cover removed. d

Fig. 2 shows a section on line A-B of Fig. 1.

Fig. 3 is a detail of the pawl for locking the bolt in its keeper. v

Fig. 4 is a detail of the tooth and stop pin associated with the auxiliary bar and sliding bolt.

I is the casing for the door lock mechanism, 2 is the sliding bolt mounted therein, 3 is an auxiliary bar moving parallel with the sliding bolt 2, and 4 is a tooth moving transversely in the bar 3; this said tooth 4, on the inward movement of the bar 3 raises the stop pin 5 in order to allow for the inward movement of the bolt 2', and on the outward movement of said bar 3, through the tension of a helical spring I6, this tooth 4 does not act upon the stop 5. 6 is an inclined extension integral with the stop 5, this said inclined extension co-operates with a correspondingly shaped groove formed on the tooth 4, so that when the bar 3 moves inwards the stop 5 is raised above the notch 9.

'I'he bar 3 is provided with a spring device which serves to retain the bolt, in a locked position, and said bolt can only be unlocked by an electrically operated means; namely an electro-magnet.

The spring device consists of a bow shaped member Ill, one end of which is slidably mounted on a spindle I I and the opposite end on the bar 3. A helical spring I2 inserted over the spindle II abuts at one end against the flange I3 of the bow I Il, the opposite end of said spring I2 abuts against a Washer 3 adjacent the flange I5 at the opposite end of the bow I0. A helical spring I6 is mounted on the sleeve I1, which latter, forms a guide for the inner end of the spindle |I. Said spring I6 is interposed between the casing I and a washer I8 mounted on the bar 3. The movement of the r washer I8 is limited by a pin I9 transversely fixed to the spindle II.

Each time the bar 3 is forced inwards into the casing the stop 5 is raised by means of the tooth 4. At this moment the bolt 2 is acted upon by a spring 20, thereby, moving the bolt into a position indicated by dotted lines in Fig. 1, so that, every time the door is closed, the bolt automatically moves into the position shown in dotted lines in Fig. 1.

The tooth 4, at every opening of the'door, moves forward andrides over the inclined extension 6 through ther inclined surface 2|', thus raising the tooth 4 against the tension `of the spring 22, and this said tooth again falls, after having passed over the inclined surface 6, into its normal position as shown in Figgl.

VThe bolt 2 can be moved inwardly by means of rotating akey 23,(Fig. 1), which'engages with a lever 24 actuating in a cleft 25 of the bolt 2|,

which raises a stop 26l integral with a pawl 21, lo

pivoted at 28 to the casing I. The stop 26 serves to retain the bolt in a closed position, when lying in a notch 31 on the bolt 2.

. LVI/'hen thebar 3iis moved' inwardly, an extension 29 integral with the flange I3 of the bow II), en- 15 gages a step 3Il, on the bolt 2, this step is disposed in an advanced position when the bolt is in the locked position thereby compressing the spring I2 by means of the flange I5 engaging in the notch Y 33 provided in a lever 3| pivoted at 32 to the casing I. The underside of the free end of the lever 3| contacts with the end of an armature 34 pivoted at 35, this said armature being attracted by the fixed cores of two electromagnets 36, 36. The following parts, namely: the bow I0, the spring I2, the ilange I3 with extension 29, the flange l5, washer 3', stop 30 and lever 3| with notch 33 serve to load the bolt by means of the spring I2, which latter, is of a greater tension than the spring 20,'thus permitting the electromagnet to actuate the lock mechanism.

When current is passed through the coils 36, 36', the armature .is attracted when it will move out of contact with the lever 3| which then rotates downwards causing the extension 29 integral with the flange I3, through the tension of the spring I2, to engage with the step 30 on the bolt 2, which latter, will then slide inwardly. In order that the stop 26 will not hinder the movement of the bolt 2, there is provided on the armature 34, an extension 39 which engages with an inclined extension integral with the stop 36, which raises it when the armature 34 is attracted. The stop 26 being integral with the pawl 21 is thereby operated by the armature extension 39.

In order to secure the locking position of the bolt, against any mechanical means from the exterior, other than the appropriate key, one end 4U of the notch 31 is chamfered (Fig. 3) and the corresponding side of the stop 38 is shaped cor- 50 respondingly.

By this manner the part 38 of the stop 26 serves as a wedge in the side 40 of the notch 31 and it is thus impossible to cause any abusive opening of the sliding bolt 2.

ciy

I claim:

1. In a lock, the combination of a casing, a sliding bolt provided with a step and recesses mounted therein, an auxiliary bar with a lateral extension near the inner end slidably mounted in said casing, a tooth adapted to move transversely in said auxiliary bar, a stop pin co-operating with said tooth engaging with one of the recesses in the sliding bolt adapted to move transversely on said bolt, said tooth raising the stop pin out of the recess in the bolt on the inward movement of said bar, spring means associated with said bar moving same in alternate directions, a pawl provided with a lug engaging with the second rece in the sliding bolt pivotally mounted in said cas-v ing, an electro-magnet xed to said casing, alever pivotally mounted in said casing engaging with said spring means and a spring imparting outward movement to the sliding bolt, the arrangement being such that when the armature of the electromagnet is attracted, the pawl is raised from the recess in the sliding bolt, the lever releasing said spring mechanism, and said spring mechanism imparting an inward movement to the sliding bolt through the lateral extension on the auxiliary bar engaging with the step on said sliding bolt.

2. In a lock, the combination of a casing, a sliding bolt provided with a step and recesses mounted therein, an auxiliary bar slidably mounted in said casing, a tooth with an inclined guideway moving transversely in said bar, a spring acting upon said tooth, a stop pin with an inclined extension corresponding to said inclined guideway moving transversely on the sliding bolt and engaging with a recess thereon, said guideway engaging with said extension for lifting the stop pin out of the recess in the bolt on the inward movement of said bar, and on the outward movement of said bar, said tooth riding over the inclined extension of said stop, a spring associated with the slidable bolt moving same outwardly, a spindle integral with said auxiliary bar, a bow mounted on said bar and spindle, a helical spring inserted on said spindle between the ends of said bow, the inner end of said bow engaging with the step on the sliding bolt, a sleeve xed to the casing for receiving the end of the spindle, a. disc mounted on said spindle with limited movement in one direction, a helical spring inserted over said sleeve interposed between the casing and disc imparting outward movement t0 said auxiliary bar, a pawl provided with a lug and an inclined surface pivotally mounted on said casing, said pawl engaging with the second recess on the bolt, a lever engaging with said bar pivotally mounted in said casing, an electro-magnet ixed to the casing, the outer end of the armature cooperating With said pawl and inclined surface, and lever, said armature on being attracted raising the pawl out of engagement with the recess in the sliding bolt and releasing the lever from the bow allowing inward movement of the auxiliary bar and sliding bolt through the tension of the rst mentioned helical spring, and a lever pivotally mounted at one end to the casing and the outer end adapted to engage said pawl for mechanically operating the sliding bolt.

FRITZ HONSEL. 

